Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

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Record number 496615
Title A previously undescribed jasmonate compound in flowering Arabidopsis thaliana - The identification of cis-(+)-OPDA-Ile
Author(s) Flokova, Kristyna; Feussner, Kirstin; Herrfurth, Cornelia; Miersch, Otto; Mik, Václav; Tarkowská, Danuše; Strnad, Miroslav; Feussner, Ivo; Wasternack, Claus; Novák, Ondřej
Source Phytochemistry 122 (2016). - ISSN 0031-9422 - p. 230 - 237.
DOI http://dx.doi.org/10.1016/j.phytochem.2015.11.012
Department(s) Laboratory of Plant Physiology
EPS
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Arabidopsis thaliana (Brassicaceae) - Cis-(+)-12-oxo-phytodienoyl-l-isoleucine (cis-(+)-OPDA-Ile) - Jasmonates - Solid-phase extraction (SPE) - Tandem mass spectrometry (MS/MS) - Ultra-high performance liquid chromatography (UHPLC)
Abstract

Jasmonates (JAs) are plant hormones that integrate external stress stimuli with physiological responses. (+)-7-iso-JA-L-Ile is the natural JA ligand of COI1, a component of a known JA receptor. The upstream JA biosynthetic precursor cis-(+)-12-oxo-phytodienoic acid (cis-(+)-OPDA) has been reported to act independently of COI1 as an essential signal in several stress-induced and developmental processes. Wound-induced increases in the endogenous levels of JA/JA-Ile are accompanied by two to tenfold increases in the concentration of OPDA, but its means of perception and metabolism are unknown. To screen for putative OPDA metabolites, vegetative tissues of flowering Arabidopsis thaliana were extracted with 25% aqueous methanol (v/v), purified by single-step reversed-phase polymer-based solid-phase extraction, and analyzed by high throughput mass spectrometry. This enabled the detection and quantitation of a low abundant OPDA analog of the biologically active (+)-7-iso-JA-L-Ile in plant tissue samples. Levels of the newly identified compound and the related phytohormones JA, JA-Ile and cis-(+)-OPDA were monitored in wounded leaves of flowering Arabidopsis lines (Col-0 and Ws) and compared to the levels observed in Arabidopsis mutants deficient in the biosynthesis of JA (dde2-2, opr3) and JA-Ile (jar1). The observed cis-(+)-OPDA-Ile levels varied widely, raising questions concerning its role in Arabidopsis stress responses.

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